|Name|Hanzi|Population (2005)|Area (Km2)|
|---|---|---|---|
|Qingxi|清溪镇|20,000|2.9|
|Ruyi|如意镇|15,100|33.85|
|Yintian|银田镇|19,500|28|
|Daping|大坪乡|14,300|32|
|Yongyi|永义乡|10,600|24|
|Shaoshan|韶山乡|14,700|37.62|
|Yanglin|杨林乡|20,600|58.8|

Question: how many divisions had a population of at least 15,000?
Answer: 4